Allows modification of gains for stats, resources, experience gain, category points, and prodigy points. If you would like to be able to modify other values post them in the comments.
UPDATE: I've added the ability to modify stat and level maximums. I have also added the ability to customize which levels stats, talents, talent types, and prodigies are gained at. This allows for alternative leveling schemes such as gaining 2 class points on every even level and 2 generic points every odd level. For example, the max/milestone level could be set to 100, xp gain at 300, and all intervals doubled with alternating offsets for a faster early game, a slower late game, and increased potential for early game specialization.